drivers/misc/sgi-gru/grutlbpurge.c: removed duplicated #include

Removed duplicated include <linux/delay.h> in
drivers/misc/sgi-gru/grutlbpurge.c.

Signed-off-by: Huang Weiyi <[e-mail]>
Cc: Jack Steiner <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/misc/sgi-gru/grutlbpurge.c

···
 #include <linux/hugetlb.h>
 #include <linux/delay.h>
 #include <linux/timex.h>
-#include <linux/delay.h>
 #include <linux/srcu.h>
 #include <asm/processor.h>
 #include "gru.h"